<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

{:captcha_img()}
<!--<img src="{:captcha_src()}" alt="">-->

<form action="/check" method="post">
    <input type="text" name="code">
    <input type="submit" value="验证">
</form>

</body>
</html>